Fig. REF  summarizes the relations between the sequence \(x\) , the DZT \(\) , and the DFT \(X\) . Note that the DFT \(X\)  can be obtained in two ways. Either directly via (REF ) or indirectly using (REF ) and (REF ). The later approach resembles the Cooley-Tuckey algorithm, a fast Fourier transform algorithm [1]}.
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